Here is the circuit of an Arduino-based Panic Alarm! The wiring is very simple so that even a novice can construct ... LED output Pin int pzSpeaker = 10; //Piezo-speaker Output Pin int val = 0; // ...

Turn ON an LED Sketch This is a very simple arduino project where a led is turned on by setting the pin 13 as output, then write it with a high value, in our case that means that pin 13 will deliver 5 ...